* {
  margin: 0;
  padding: 0
}

canvas {
    width:100%;
    height:100%;
    position:absolute;
    z-index:-999;
    float:none;
    margin-left: 0;
    margin-right: 0;
    margin-top: 0;
}

.enterBtn {
    display: block;
    font-size: 22px;
    text-align: center;
    line-height: 44px;
    text-decoration: none;
    color: white;
    background-color: #000000;
    border-radius: 4px;
    position: absolute;
    /*top: 50%;*/
    /*left: 50%;*/
    /*width: 124px;*/
    /*height: 44px;*/
    /*margin-top: -22px;*/
    /*margin-left: -62px;*/
    text-shadow: 0 -1px -1px #7c7c7c;
    -moz-box-shadow: 0 4px 0 #7c7c7c, 0 5px 5px 1px rgba(0, 0, 0, 0.4);
    -webkit-box-shadow: 0 4px 0 #7c7c7c, 0 5px 5px 1px rgba(0, 0, 0, 0.4);
    box-shadow: 0 4px 0 #7c7c7c, 0 5px 5px 1px rgba(0, 0, 0, 0.4);
    -moz-transition: all 0.15s ease-in-out;
    -o-transition: all 0.15s ease-in-out;
    -webkit-transition: all 0.15s ease-in-out;
    transition: all 0.15s ease-in-out;
}
.enterBtn:hover {
    background-color: #9b9b9b;
    text-shadow: 0 -1px -1px #898989;
    -moz-box-shadow: 0 4px 0 #898989, 0 5px 5px 1px rgba(0, 0, 0, 0.4);
    -webkit-box-shadow: 0 4px 0 #898989, 0 5px 5px 1px rgba(0, 0, 0, 0.4);
    box-shadow: 0 4px 0 #898989, 0 5px 5px 1px rgba(0, 0, 0, 0.4);
}
.enterBtn:active {
    margin-top: -18px;
    -moz-box-shadow: none;
    -webkit-box-shadow: none;
    box-shadow: none;
}